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| Number | Title | Issue Date |
| 7013122 | Ultra high isolation mixer A double balanced mixer for mixing an RF input signal with a local oscillator signal to provide at an output an intermediate frequency signal with high isolation over a wide frequency range. The mixer includes a local oscillator balun that is operable to receive a l... | 03/14/2006 |
| 6957055 | Double balanced FET mixer with high IP3 and IF response down to DC levels A double balanced FET mixer that has a high third order intercept point and an intermediate frequency response that goes to direct current levels. The mixer includes a local oscillator terminal, a RF terminal and an intermediate frequency terminal. The mixer has a p... | 10/18/2005 |
| 6946924 | Low noise voltage controlled oscillator A voltage controlled oscillator, comprising a pair of transistors connected to a tank circuit, said tank circuit including a plurality of tuning diodes connected in parallel with an inductor, said tuning diodes having cathodes connected to a common connection. ... | 09/20/2005 |
| 5055810 | Ultra-high speed light activated microwave switch/modulation using photoreactive effect The RF/microwave switch/modulator uses an optically controlled diode 20. The reactance of the diode may be varied by varying the illumination intensity. In this fashion, the photodiode in conjunction with an external circuit can switch or modulate a micro... | 10/08/1991 |
| 4890076 | Reflection type SSB modulator The SSB modulator according to the present invention is comprised of a driving voltage generator, a diode, a bias supply circuit, an impedance transformation circuit and an input/output terminal. The SSB modulator is arranged such that the impedance of th... | 12/26/1989 |
| 4782350 | Amorphous silicon varactors as rf amplitude modulators and their application to acoustic ink printers Amorphous silicon (aSi) voltage-controlled, variable capacitors (varactors) are utilized as rf amplitude modulators, such as for amplitude modulating the rf applied to an acoustic ink printhead. Large area fabrication processes are employed for vertically... | 11/01/1988 |
| 4492935 | Switched capacitor oscillator formed by a damped resonator with saturable feedback A switched capacitor oscillator is constructed by providing a damped resonator network with a comparator as a nonlinear feedback element by connecting the input of the comparator to the output of a first operational amplifier of the resonator network and ... | 01/08/1985 |
